1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * ocfs2.h
5 *
6 * Defines macros and structures used in OCFS2
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #ifndef OCFS2_H
27 #define OCFS2_H
28
29 #include <linux/spinlock.h>
30 #include <linux/sched.h>
31 #include <linux/wait.h>
32 #include <linux/list.h>
33 #include <linux/llist.h>
34 #include <linux/rbtree.h>
35 #include <linux/workqueue.h>
36 #include <linux/kref.h>
37 #include <linux/mutex.h>
38 #include <linux/lockdep.h>
39 #include <linux/jbd2.h>
40
41 /* For union ocfs2_dlm_lksb */
42 #include "stackglue.h"
43
44 #include "ocfs2_fs.h"
45 #include "ocfs2_lockid.h"
46 #include "ocfs2_ioctl.h"
47
48 /* For struct ocfs2_blockcheck_stats */
49 #include "blockcheck.h"
50
51 #include "reservations.h"
52
53 #include "filecheck.h"
54
55 /* Caching of metadata buffers */
56
57 /* Most user visible OCFS2 inodes will have very few pieces of
58 * metadata, but larger files (including bitmaps, etc) must be taken
59 * into account when designing an access scheme. We allow a small
60 * amount of inlined blocks to be stored on an array and grow the
61 * structure into a rb tree when necessary. */
62 #define OCFS2_CACHE_INFO_MAX_ARRAY 2
63
64 /* Flags for ocfs2_caching_info */
65
66 enum ocfs2_caching_info_flags {
67 /* Indicates that the metadata cache is using the inline array */
68 OCFS2_CACHE_FL_INLINE = 1<<1,
69 };
70
71 struct ocfs2_caching_operations;
72 struct ocfs2_caching_info {
73 /*
74 * The parent structure provides the locks, but because the
75 * parent structure can differ, it provides locking operations
76 * to struct ocfs2_caching_info.
77 */
78 const struct ocfs2_caching_operations *ci_ops;
79
80 /* next two are protected by trans_inc_lock */
81 /* which transaction were we created on? Zero if none. */
82 unsigned long ci_created_trans;
83 /* last transaction we were a part of. */
84 unsigned long ci_last_trans;
85
86 /* Cache structures */
87 unsigned int ci_flags;
88 unsigned int ci_num_cached;
89 union {
90 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
91 struct rb_root ci_tree;
92 } ci_cache;
93 };
94 /*
95 * Need this prototype here instead of in uptodate.h because journal.h
96 * uses it.
97 */
98 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
99
100 /* this limits us to 256 nodes
101 * if we need more, we can do a kmalloc for the map */
102 #define OCFS2_NODE_MAP_MAX_NODES 256
103 struct ocfs2_node_map {
104 u16 num_nodes;
105 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
106 };
107
108 enum ocfs2_ast_action {
109 OCFS2_AST_INVALID = 0,
110 OCFS2_AST_ATTACH,
111 OCFS2_AST_CONVERT,
112 OCFS2_AST_DOWNCONVERT,
113 };
114
115 /* actions for an unlockast function to take. */
116 enum ocfs2_unlock_action {
117 OCFS2_UNLOCK_INVALID = 0,
118 OCFS2_UNLOCK_CANCEL_CONVERT,
119 OCFS2_UNLOCK_DROP_LOCK,
120 };
121
122 /* ocfs2_lock_res->l_flags flags. */
123 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
124 * the lvb */
125 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
126 * dlm_lock */
127 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
128 * downconvert*/
129 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
130 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
131 #define OCFS2_LOCK_REFRESHING (0x00000020)
132 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
133 * for shutdown paths */
134 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
135 * when to skip queueing
136 * a lock because it's
137 * about to be
138 * dropped. */
139 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
140 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
141 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
142 call to dlm_lock. Only
143 exists with BUSY set. */
144 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
145 * from downconverting
146 * before the upconvert
147 * has completed */
148
149 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
150 * lock has already
151 * returned, do not block
152 * dc thread from
153 * downconverting */
154
155 struct ocfs2_lock_res_ops;
156
157 typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
158
159 #ifdef CONFIG_OCFS2_FS_STATS
160 struct ocfs2_lock_stats {
161 u64 ls_total; /* Total wait in NSEC */
162 u32 ls_gets; /* Num acquires */
163 u32 ls_fail; /* Num failed acquires */
164
165 /* Storing max wait in usecs saves 24 bytes per inode */
166 u32 ls_max; /* Max wait in USEC */
167 };
168 #endif
169
170 struct ocfs2_lock_res {
171 void *l_priv;
172 struct ocfs2_lock_res_ops *l_ops;
173
174
175 struct list_head l_blocked_list;
176 struct list_head l_mask_waiters;
177 struct list_head l_holders;
178
179 unsigned long l_flags;
180 char l_name[OCFS2_LOCK_ID_MAX_LEN];
181 unsigned int l_ro_holders;
182 unsigned int l_ex_holders;
183 signed char l_level;
184 signed char l_requested;
185 signed char l_blocking;
186
187 /* Data packed - type enum ocfs2_lock_type */
188 unsigned char l_type;
189
190 /* used from AST/BAST funcs. */
191 /* Data packed - enum type ocfs2_ast_action */
192 unsigned char l_action;
193 /* Data packed - enum type ocfs2_unlock_action */
194 unsigned char l_unlock_action;
195 unsigned int l_pending_gen;
196
197 spinlock_t l_lock;
198
199 struct ocfs2_dlm_lksb l_lksb;
200
201 wait_queue_head_t l_event;
202
203 struct list_head l_debug_list;
204
205 #ifdef CONFIG_OCFS2_FS_STATS
206 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
207 u32 l_lock_refresh; /* Disk refreshes */
208 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
209 #endif
210 #ifdef CONFIG_DEBUG_LOCK_ALLOC
211 struct lockdep_map l_lockdep_map;
212 #endif
213 };
214
215 enum ocfs2_orphan_reco_type {
216 ORPHAN_NO_NEED_TRUNCATE = 0,
217 ORPHAN_NEED_TRUNCATE,
218 };
219
220 enum ocfs2_orphan_scan_state {
221 ORPHAN_SCAN_ACTIVE,
222 ORPHAN_SCAN_INACTIVE
223 };
224
225 struct ocfs2_orphan_scan {
226 struct mutex os_lock;
227 struct ocfs2_super *os_osb;
228 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
229 struct delayed_work os_orphan_scan_work;
230 time64_t os_scantime; /* time this node ran the scan */
231 u32 os_count; /* tracks node specific scans */
232 u32 os_seqno; /* tracks cluster wide scans */
233 atomic_t os_state; /* ACTIVE or INACTIVE */
234 };
235
236 struct ocfs2_dlm_debug {
237 struct kref d_refcnt;
238 struct dentry *d_locking_state;
239 struct list_head d_lockres_tracking;
240 };
241
242 enum ocfs2_vol_state
243 {
244 VOLUME_INIT = 0,
245 VOLUME_MOUNTED,
246 VOLUME_MOUNTED_QUOTAS,
247 VOLUME_DISMOUNTED,
248 VOLUME_DISABLED
249 };
250
251 struct ocfs2_alloc_stats
252 {
253 atomic_t moves;
254 atomic_t local_data;
255 atomic_t bitmap_data;
256 atomic_t bg_allocs;
257 atomic_t bg_extends;
258 };
259
260 enum ocfs2_local_alloc_state
261 {
262 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
263 * this mountpoint. */
264 OCFS2_LA_ENABLED, /* Local alloc is in use. */
265 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
266 * of bits has been reduced. */
267 OCFS2_LA_DISABLED /* Local alloc has temporarily been
268 * disabled. */
269 };
270
271 enum ocfs2_mount_options
272 {
273 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
274 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
275 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
276 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
277 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
278 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
279 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
280 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
281 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
282 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
283 control lists */
284 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
285 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
286 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
287 writes */
288 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
289 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
290
291 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
292 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */
293 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */
294 };
295
296 #define OCFS2_OSB_SOFT_RO 0x0001
297 #define OCFS2_OSB_HARD_RO 0x0002
298 #define OCFS2_OSB_ERROR_FS 0x0004
299 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
300
301 struct ocfs2_journal;
302 struct ocfs2_slot_info;
303 struct ocfs2_recovery_map;
304 struct ocfs2_replay_map;
305 struct ocfs2_quota_recovery;
306 struct ocfs2_super
307 {
308 struct task_struct *commit_task;
309 struct super_block *sb;
310 struct inode *root_inode;
311 struct inode *sys_root_inode;
312 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
313 struct inode **local_system_inodes;
314
315 struct ocfs2_slot_info *slot_info;
316
317 u32 *slot_recovery_generations;
318
319 spinlock_t node_map_lock;
320
321 u64 root_blkno;
322 u64 system_dir_blkno;
323 u64 bitmap_blkno;
324 u32 bitmap_cpg;
325 char *uuid_str;
326 u32 uuid_hash;
327 u8 *vol_label;
328 u64 first_cluster_group_blkno;
329 u32 fs_generation;
330
331 u32 s_feature_compat;
332 u32 s_feature_incompat;
333 u32 s_feature_ro_compat;
334
335 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
336 * Could protect more on osb as it's very short lived.
337 */
338 spinlock_t osb_lock;
339 u32 s_next_generation;
340 unsigned long osb_flags;
341 u16 s_inode_steal_slot;
342 u16 s_meta_steal_slot;
343 atomic_t s_num_inodes_stolen;
344 atomic_t s_num_meta_stolen;
345
346 unsigned long s_mount_opt;
347 unsigned int s_atime_quantum;
348
349 unsigned int max_slots;
350 unsigned int node_num;
351 int slot_num;
352 int preferred_slot;
353 int s_sectsize_bits;
354 int s_clustersize;
355 int s_clustersize_bits;
356 unsigned int s_xattr_inline_size;
357
358 atomic_t vol_state;
359 struct mutex recovery_lock;
360 struct ocfs2_recovery_map *recovery_map;
361 struct ocfs2_replay_map *replay_map;
362 struct task_struct *recovery_thread_task;
363 int disable_recovery;
364 wait_queue_head_t checkpoint_event;
365 struct ocfs2_journal *journal;
366 unsigned long osb_commit_interval;
367
368 struct delayed_work la_enable_wq;
369
370 /*
371 * Must hold local alloc i_mutex and osb->osb_lock to change
372 * local_alloc_bits. Reads can be done under either lock.
373 */
374 unsigned int local_alloc_bits;
375 unsigned int local_alloc_default_bits;
376 /* osb_clusters_at_boot can become stale! Do not trust it to
377 * be up to date. */
378 unsigned int osb_clusters_at_boot;
379
380 enum ocfs2_local_alloc_state local_alloc_state; /* protected
381 * by osb_lock */
382
383 struct buffer_head *local_alloc_bh;
384
385 u64 la_last_gd;
386
387 struct ocfs2_reservation_map osb_la_resmap;
388
389 unsigned int osb_resv_level;
390 unsigned int osb_dir_resv_level;
391
392 /* Next two fields are for local node slot recovery during
393 * mount. */
394 struct ocfs2_dinode *local_alloc_copy;
395 struct ocfs2_quota_recovery *quota_rec;
396
397 struct ocfs2_blockcheck_stats osb_ecc_stats;
398 struct ocfs2_alloc_stats alloc_stats;
399 char dev_str[20]; /* "major,minor" of the device */
400
401 u8 osb_stackflags;
402
403 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
404 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
405 struct ocfs2_cluster_connection *cconn;
406 struct ocfs2_lock_res osb_super_lockres;
407 struct ocfs2_lock_res osb_rename_lockres;
408 struct ocfs2_lock_res osb_nfs_sync_lockres;
409 struct rw_semaphore nfs_sync_rwlock;
410 struct ocfs2_lock_res osb_trim_fs_lockres;
411 struct ocfs2_dlm_debug *osb_dlm_debug;
412
413 struct dentry *osb_debug_root;
414 struct dentry *osb_ctxt;
415
416 wait_queue_head_t recovery_event;
417
418 spinlock_t dc_task_lock;
419 struct task_struct *dc_task;
420 wait_queue_head_t dc_event;
421 unsigned long dc_wake_sequence;
422 unsigned long dc_work_sequence;
423
424 /*
425 * Any thread can add locks to the list, but the downconvert
426 * thread is the only one allowed to remove locks. Any change
427 * to this rule requires updating
428 * ocfs2_downconvert_thread_do_work().
429 */
430 struct list_head blocked_lock_list;
431 unsigned long blocked_lock_count;
432
433 /* List of dquot structures to drop last reference to */
434 struct llist_head dquot_drop_list;
435 struct work_struct dquot_drop_work;
436
437 wait_queue_head_t osb_mount_event;
438
439 /* Truncate log info */
440 struct inode *osb_tl_inode;
441 struct buffer_head *osb_tl_bh;
442 struct delayed_work osb_truncate_log_wq;
443 atomic_t osb_tl_disable;
444 /*
445 * How many clusters in our truncate log.
446 * It must be protected by osb_tl_inode->i_mutex.
447 */
448 unsigned int truncated_clusters;
449
450 struct ocfs2_node_map osb_recovering_orphan_dirs;
451 unsigned int *osb_orphan_wipes;
452 wait_queue_head_t osb_wipe_event;
453
454 struct ocfs2_orphan_scan osb_orphan_scan;
455
456 /* used to protect metaecc calculation check of xattr. */
457 spinlock_t osb_xattr_lock;
458
459 unsigned int osb_dx_mask;
460 u32 osb_dx_seed[4];
461
462 /* the group we used to allocate inodes. */
463 u64 osb_inode_alloc_group;
464
465 /* rb tree root for refcount lock. */
466 struct rb_root osb_rf_lock_tree;
467 struct ocfs2_refcount_tree *osb_ref_tree_lru;
468
469 struct mutex system_file_mutex;
470
471 /*
472 * OCFS2 needs to schedule several different types of work which
473 * require cluster locking, disk I/O, recovery waits, etc. Since these
474 * types of work tend to be heavy we avoid using the kernel events
475 * workqueue and schedule on our own.
476 */
477 struct workqueue_struct *ocfs2_wq;
478
479 /* sysfs directory per partition */
480 struct kset *osb_dev_kset;
481
482 /* file check related stuff */
483 struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
484 };
485
486 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
487
488 /* Useful typedef for passing around journal access functions */
489 typedef int (*ocfs2_journal_access_func)(handle_t *handle,
490 struct ocfs2_caching_info *ci,
491 struct buffer_head *bh, int type);
492
ocfs2_should_order_data(struct inode * inode)493 static inline int ocfs2_should_order_data(struct inode *inode)
494 {
495 if (!S_ISREG(inode->i_mode))
496 return 0;
497 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
498 return 0;
499 return 1;
500 }
501
ocfs2_sparse_alloc(struct ocfs2_super * osb)502 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
503 {
504 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
505 return 1;
506 return 0;
507 }
508
ocfs2_writes_unwritten_extents(struct ocfs2_super * osb)509 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
510 {
511 /*
512 * Support for sparse files is a pre-requisite
513 */
514 if (!ocfs2_sparse_alloc(osb))
515 return 0;
516
517 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
518 return 1;
519 return 0;
520 }
521
ocfs2_supports_append_dio(struct ocfs2_super * osb)522 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
523 {
524 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
525 return 1;
526 return 0;
527 }
528
529
ocfs2_supports_inline_data(struct ocfs2_super * osb)530 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
531 {
532 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
533 return 1;
534 return 0;
535 }
536
ocfs2_supports_xattr(struct ocfs2_super * osb)537 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
538 {
539 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
540 return 1;
541 return 0;
542 }
543
ocfs2_meta_ecc(struct ocfs2_super * osb)544 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
545 {
546 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
547 return 1;
548 return 0;
549 }
550
ocfs2_supports_indexed_dirs(struct ocfs2_super * osb)551 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
552 {
553 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
554 return 1;
555 return 0;
556 }
557
ocfs2_supports_discontig_bg(struct ocfs2_super * osb)558 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
559 {
560 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
561 return 1;
562 return 0;
563 }
564
ocfs2_link_max(struct ocfs2_super * osb)565 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
566 {
567 if (ocfs2_supports_indexed_dirs(osb))
568 return OCFS2_DX_LINK_MAX;
569 return OCFS2_LINK_MAX;
570 }
571
ocfs2_read_links_count(struct ocfs2_dinode * di)572 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
573 {
574 u32 nlink = le16_to_cpu(di->i_links_count);
575 u32 hi = le16_to_cpu(di->i_links_count_hi);
576
577 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
578 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
579
580 return nlink;
581 }
582
ocfs2_set_links_count(struct ocfs2_dinode * di,u32 nlink)583 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
584 {
585 u16 lo, hi;
586
587 lo = nlink;
588 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
589
590 di->i_links_count = cpu_to_le16(lo);
591 di->i_links_count_hi = cpu_to_le16(hi);
592 }
593
ocfs2_add_links_count(struct ocfs2_dinode * di,int n)594 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
595 {
596 u32 links = ocfs2_read_links_count(di);
597
598 links += n;
599
600 ocfs2_set_links_count(di, links);
601 }
602
ocfs2_refcount_tree(struct ocfs2_super * osb)603 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
604 {
605 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
606 return 1;
607 return 0;
608 }
609
610 /* set / clear functions because cluster events can make these happen
611 * in parallel so we want the transitions to be atomic. this also
612 * means that any future flags osb_flags must be protected by spinlock
613 * too! */
ocfs2_set_osb_flag(struct ocfs2_super * osb,unsigned long flag)614 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
615 unsigned long flag)
616 {
617 spin_lock(&osb->osb_lock);
618 osb->osb_flags |= flag;
619 spin_unlock(&osb->osb_lock);
620 }
621
ocfs2_set_ro_flag(struct ocfs2_super * osb,int hard)622 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
623 int hard)
624 {
625 spin_lock(&osb->osb_lock);
626 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
627 if (hard)
628 osb->osb_flags |= OCFS2_OSB_HARD_RO;
629 else
630 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
631 spin_unlock(&osb->osb_lock);
632 }
633
ocfs2_is_hard_readonly(struct ocfs2_super * osb)634 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
635 {
636 int ret;
637
638 spin_lock(&osb->osb_lock);
639 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
640 spin_unlock(&osb->osb_lock);
641
642 return ret;
643 }
644
ocfs2_is_soft_readonly(struct ocfs2_super * osb)645 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
646 {
647 int ret;
648
649 spin_lock(&osb->osb_lock);
650 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
651 spin_unlock(&osb->osb_lock);
652
653 return ret;
654 }
655
ocfs2_clusterinfo_valid(struct ocfs2_super * osb)656 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
657 {
658 return (osb->s_feature_incompat &
659 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
660 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
661 }
662
ocfs2_userspace_stack(struct ocfs2_super * osb)663 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
664 {
665 if (ocfs2_clusterinfo_valid(osb) &&
666 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
667 OCFS2_STACK_LABEL_LEN))
668 return 1;
669 return 0;
670 }
671
ocfs2_o2cb_stack(struct ocfs2_super * osb)672 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
673 {
674 if (ocfs2_clusterinfo_valid(osb) &&
675 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
676 OCFS2_STACK_LABEL_LEN))
677 return 1;
678 return 0;
679 }
680
ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super * osb)681 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
682 {
683 return ocfs2_o2cb_stack(osb) &&
684 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
685 }
686
ocfs2_mount_local(struct ocfs2_super * osb)687 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
688 {
689 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
690 }
691
ocfs2_uses_extended_slot_map(struct ocfs2_super * osb)692 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
693 {
694 return (osb->s_feature_incompat &
695 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
696 }
697
698
699 #define OCFS2_IS_VALID_DINODE(ptr) \
700 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
701
702 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
703 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
704
705 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
706 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
707
708
709 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
710 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
711
712 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
713 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
714
715 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
716 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
717
718 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
719 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
720
721 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
722 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
723
ino_from_blkno(struct super_block * sb,u64 blkno)724 static inline unsigned long ino_from_blkno(struct super_block *sb,
725 u64 blkno)
726 {
727 return (unsigned long)(blkno & (u64)ULONG_MAX);
728 }
729
ocfs2_clusters_to_blocks(struct super_block * sb,u32 clusters)730 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
731 u32 clusters)
732 {
733 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
734 sb->s_blocksize_bits;
735
736 return (u64)clusters << c_to_b_bits;
737 }
738
ocfs2_clusters_for_blocks(struct super_block * sb,u64 blocks)739 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
740 u64 blocks)
741 {
742 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
743 sb->s_blocksize_bits;
744
745 blocks += (1 << b_to_c_bits) - 1;
746 return (u32)(blocks >> b_to_c_bits);
747 }
748
ocfs2_blocks_to_clusters(struct super_block * sb,u64 blocks)749 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
750 u64 blocks)
751 {
752 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
753 sb->s_blocksize_bits;
754
755 return (u32)(blocks >> b_to_c_bits);
756 }
757
ocfs2_clusters_for_bytes(struct super_block * sb,u64 bytes)758 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
759 u64 bytes)
760 {
761 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
762 unsigned int clusters;
763
764 bytes += OCFS2_SB(sb)->s_clustersize - 1;
765 /* OCFS2 just cannot have enough clusters to overflow this */
766 clusters = (unsigned int)(bytes >> cl_bits);
767
768 return clusters;
769 }
770
ocfs2_bytes_to_clusters(struct super_block * sb,u64 bytes)771 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
772 u64 bytes)
773 {
774 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
775 unsigned int clusters;
776
777 clusters = (unsigned int)(bytes >> cl_bits);
778 return clusters;
779 }
780
ocfs2_blocks_for_bytes(struct super_block * sb,u64 bytes)781 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
782 u64 bytes)
783 {
784 bytes += sb->s_blocksize - 1;
785 return bytes >> sb->s_blocksize_bits;
786 }
787
ocfs2_clusters_to_bytes(struct super_block * sb,u32 clusters)788 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
789 u32 clusters)
790 {
791 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
792 }
793
ocfs2_block_to_cluster_start(struct super_block * sb,u64 blocks)794 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
795 u64 blocks)
796 {
797 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
798 unsigned int clusters;
799
800 clusters = ocfs2_blocks_to_clusters(sb, blocks);
801 return (u64)clusters << bits;
802 }
803
ocfs2_align_bytes_to_clusters(struct super_block * sb,u64 bytes)804 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
805 u64 bytes)
806 {
807 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
808 unsigned int clusters;
809
810 clusters = ocfs2_clusters_for_bytes(sb, bytes);
811 return (u64)clusters << cl_bits;
812 }
813
ocfs2_align_bytes_to_blocks(struct super_block * sb,u64 bytes)814 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
815 u64 bytes)
816 {
817 u64 blocks;
818
819 blocks = ocfs2_blocks_for_bytes(sb, bytes);
820 return blocks << sb->s_blocksize_bits;
821 }
822
ocfs2_align_bytes_to_sectors(u64 bytes)823 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
824 {
825 return (unsigned long)((bytes + 511) >> 9);
826 }
827
ocfs2_page_index_to_clusters(struct super_block * sb,unsigned long pg_index)828 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
829 unsigned long pg_index)
830 {
831 u32 clusters = pg_index;
832 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
833
834 if (unlikely(PAGE_SHIFT > cbits))
835 clusters = pg_index << (PAGE_SHIFT - cbits);
836 else if (PAGE_SHIFT < cbits)
837 clusters = pg_index >> (cbits - PAGE_SHIFT);
838
839 return clusters;
840 }
841
842 /*
843 * Find the 1st page index which covers the given clusters.
844 */
ocfs2_align_clusters_to_page_index(struct super_block * sb,u32 clusters)845 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
846 u32 clusters)
847 {
848 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
849 pgoff_t index = clusters;
850
851 if (PAGE_SHIFT > cbits) {
852 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
853 } else if (PAGE_SHIFT < cbits) {
854 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
855 }
856
857 return index;
858 }
859
ocfs2_pages_per_cluster(struct super_block * sb)860 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
861 {
862 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
863 unsigned int pages_per_cluster = 1;
864
865 if (PAGE_SHIFT < cbits)
866 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
867
868 return pages_per_cluster;
869 }
870
ocfs2_megabytes_to_clusters(struct super_block * sb,unsigned int megs)871 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
872 unsigned int megs)
873 {
874 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
875
876 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
877 }
878
ocfs2_clusters_to_megabytes(struct super_block * sb,unsigned int clusters)879 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
880 unsigned int clusters)
881 {
882 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
883 }
884
_ocfs2_set_bit(unsigned int bit,unsigned long * bitmap)885 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
886 {
887 __set_bit_le(bit, bitmap);
888 }
889 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
890
_ocfs2_clear_bit(unsigned int bit,unsigned long * bitmap)891 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
892 {
893 __clear_bit_le(bit, bitmap);
894 }
895 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
896
897 #define ocfs2_test_bit test_bit_le
898 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
899 #define ocfs2_find_next_bit find_next_bit_le
900
correct_addr_and_bit_unaligned(int * bit,void * addr)901 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
902 {
903 #if BITS_PER_LONG == 64
904 *bit += ((unsigned long) addr & 7UL) << 3;
905 addr = (void *) ((unsigned long) addr & ~7UL);
906 #elif BITS_PER_LONG == 32
907 *bit += ((unsigned long) addr & 3UL) << 3;
908 addr = (void *) ((unsigned long) addr & ~3UL);
909 #else
910 #error "how many bits you are?!"
911 #endif
912 return addr;
913 }
914
ocfs2_set_bit_unaligned(int bit,void * bitmap)915 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
916 {
917 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
918 ocfs2_set_bit(bit, bitmap);
919 }
920
ocfs2_clear_bit_unaligned(int bit,void * bitmap)921 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
922 {
923 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
924 ocfs2_clear_bit(bit, bitmap);
925 }
926
ocfs2_test_bit_unaligned(int bit,void * bitmap)927 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
928 {
929 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
930 return ocfs2_test_bit(bit, bitmap);
931 }
932
ocfs2_find_next_zero_bit_unaligned(void * bitmap,int max,int start)933 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
934 int start)
935 {
936 int fix = 0, ret, tmpmax;
937 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
938 tmpmax = max + fix;
939 start += fix;
940
941 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
942 if (ret > max)
943 return max;
944 return ret;
945 }
946
947 #endif /* OCFS2_H */
948
949